Historical carb loading (glycogen depleting ride followed by supercompensation) had the athlete eat the large carb meal >24 hours before the event to allow the food to pass before racing. After the big feed glycogen is kept up with small low-fiber snacks. Your legs and liver should be full, not your digestive system.

Modern carb loading has athletes eat high carb diets continuously; the carb "load" is created by reducing demand not increasing supply (taper).

I have a strong stomach when it comes to eating on the bike so I start pretty empty and just eat during the ride. I like a couple eggs or whey protein as soon as I wake up then some juice and a granola bar in the car. Gels, cookies and sport drink during the race.